Dynamic absorber for motor vehicle

Abstract

A dynamic absorber for a motor vehicle comprises the engine, radiator, air conditioning condenser and electric radiator fan all supported on a module support to form a module. The module is mounted on the vehicle body with elastic mounts with the center of gravity of the module located approximately at the anti-node of the vehicle body. Both the module and the idle speed of the engine are tuned to the first major beaming mode of the vehicle body.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 
     
       1. A dynamic absorber for a motor vehicle having a vehicle body with an inherent first beaming mode and an accompanying anti-node location, an engine cooled with a radiator over which air is circulated by a fan and an air conditioning system including a condenser characterized by module means comprising at least the radiator and condenser, elastomeric mount means firmly supportively mounting said module means on the vehicle body with the center of gravity of said module means located approximately at said anti-node location, said module means having a natural frequency made substantially equal to said first beaming mode, and said engine having an idle speed set substantially equal in a frequency sense to said first beaming mode. 
     
     
       2. A dynamic absorber for a motor vehicle having a vehicle body with an inherent first beaming mode and an accompanying anti-node location, an engine cooled with a radiator over which air is circulated by a fan and an air conditioning system including a condenser characterized by module means comprising the radiator and condenser and fan supported by a module support, elastomeric mount means firmly supportively mounting said module support on the vehicle body with the center of gravity of said module means located approximately at said anti-node location, said module means having a natural frequency made substantially equal to said first beaming mode, and said engine having an idle speed set substantially equal in a frequency sense to said first beaming mode. 
     
     
       3. A dynamic absorber or a motor vehicle having a vehicle body with an inherent first beaming mode and an accompanying anti-node location, an engine cooled with a radiator over which air is circulated by an electric fan and an air conditioning system including a condenser characterized by module means comprising the radiator and condenser and fan supported by a module support, the condenser and fan sandwiching and fixed to the radiator, the radiator fixed directly to said module support, a pair of shear type elastomeric mount means firmly supportively mounting said module support on the vehicle body with the center of gravity of said module means located approximately at said anti-node location, said module means having a natural frequency made substantially equal to said first beaming mode, and said engine having an idle speed set substantially equal in a frequency sense to said first beaming mode.